[sdiy] measuring pulse width with ns accuracy...

[Bert Schiettecatte]

hi Michael,

I think an approximation would do fine. but i'd like a way to 
experiment with various delays... to figure out whether my phase 
measurement circuit works.

thanks,
bert

-----Original Message-----
From: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]On Behalf Of Michael
Buchstaller
Sent: maandag 21 april 2003 1:31
To: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] measuring pulse width with ns accuracy...


>i didn't try it with a true oscilloscope, just spice. but I figured that
>if it didn't work in spice, it probably won't work in reality either... ?

Many circuits behave different in Spice than in reality. Sometimes
circuits use odd behaviour of parts (e.g. 4069 mis-used as Op-Amp),
and such things seem not to work in spice, but will in real-world.
On the other hand, simulation can fool you the other way round, too.

>maybe I should try it in reality, but then I need a way to artificially
>delay a signal by 3ns first, for my experiments.

Do you really need exactly 3 ns delay? Or will an approximation (like
sending the signal that is to be delayed through a buffer with roughly the
wanted delay time) do ?


-Michael Buchstaller